Lost actress Evangeline Lilly is convinced the tension between her and co-star Michelle Rodriguez during the filming of the hit series will result in a 'sex-off' between the two actresses. RODRIGUEZ, who made only a brief appearance in the first series, is a major player in the second and finds her character competing with Lilly's over the affections of doctor Jack. Lilly says, "I'm a bit terrified actually. Suddenly there's going to be a sex-off or something. "I'll have to find out how to out-sex her and she has to out-sex me."